16993396 has 36 divisors (see below), whose sum is σ = 34829508. Its totient is φ = 7233408.

The previous prime is 16993381. The next prime is 16993399. The reversal of 16993396 is 69339961.

It can be written as a sum of positive squares in 2 ways, for example, as 1073296 + 15920100 = 1036^2 + 3990^2 .

It is a super-2 number, since 2×16993396² = 577551015225632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16993399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54136 + ... + 54448.

Almost surely, 2^16993396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16993396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17414754).

16993396 is an abundant number, since it is smaller than the sum of its proper divisors (17836112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16993396 is a wasteful number, since it uses less digits than its factorization.

16993396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 599 counting only the distinct ones).

The product of its digits is 236196, while the sum is 46.

The square root of 16993396 is about 4122.3046951918. The cubic root of 16993396 is about 257.0948591777.

The spelling of 16993396 in words is "sixteen million, nine hundred ninety-three thousand, three hundred ninety-six".